Thymoquinone
Thymoquinone is a major bioactive compound in Nigella sativa / black seed oil studied for antioxidant, anti-inflammatory, immune-modulating, and potential anticancer mechanisms. This protocol needs full evidence and safety review.
Thymoquinone is discussed in Silver Linings of Black Cumin as a central active constituent of Nigella sativa. It is tracked separately because many cancer-related black seed oil claims focus on thymoquinone rather than the whole seed or oil.